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Home >> Toyota >> 2018 >> 86 Base, Automatic Trans >> Repair and Diagnosis >> Engine Performance >> Ignition System (Inspection) >> Ignition System >> On-Vehicle Inspection [06/2016 - ] >> Procedure

On-Vehicle Inspection [06/2016 - ]: Procedure

  1. PERFORM SPARK TEST 
    1. Check for DTCs (Refer to GENERAL INFORMATION [06/2016 - ] ).
      NOTE:

      If any DTC is present, perform troubleshooting in accordance with the procedure for that DTC.

    2. Remove the 4 ignition coils and 4 spark plugs (Refer to REMOVAL [06/2016 - ] ).
    3. Hoist the engine assembly up with an engine sling device and a mini crane.
    4. Remove the SST.
      • SST: 09250-53011 
      GTY706672Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    5. Install the 2 nuts.
      GTY720952Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Torque: 60 N*m (612 kgf*cm, 44 ft.*lbf) 

    6. for Automatic Transmission:
      GTY692330Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      1. Remove the 2 bolts and injector cover (for bank 1).
    7. for Manual Transmission:
      GTY730677Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      1. Remove the 2 bolts and disengage the 2 guides, and then remove the injector cover (for bank 1).
    8. Disconnect the 2 fuel injector connectors.
      GTY732185Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    9. for Automatic Transmission:
      GTY692330Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      1. Install the injector cover (for bank 1) with the 2 bolts.

        Torque: 19 N*m (194 kgf*cm, 14 ft.*lbf) 

    10. for Manual Transmission:
      GTY730677Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      1. Engage the 2 guides and install the injector cover (for bank 1) with the 2 bolts.

        Torque: 19 N*m (194 kgf*cm, 14 ft.*lbf) 

    11. Install the injector driver with the 3 bolts.
      GTY692329Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Torque: 6.4 N*m (65 kgf*cm, 57 in.*lbf) 

      HINT: 

      Do not connect the upper side 2 connectors.

    12. Disconnect the 2 fuel injector connectors.
      GTY692325Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    13. Connect the cable to the negative battery terminal.
    14. Install the air cleaner case sub-assembly with the hose.
    15. Install a spark plug to each ignition coil and connect the ignition coil connector.
    16. Ground the spark plug.
    17. Check that spark occurs while the engine is being cranked.
    18. Check whether sparks occur.
      NOTE:
      • Ground the spark plugs when checking them.
      • Do not crank the engine for more than 2 seconds.
      • Do not use an ignition coil and spark plug that has been dropped or subjected to a strong impact.
    19. If spark does not occur, perform the following procedure.
  2. INSPECT IGNITION COIL AND SPARK PLUG 
    1. Perform the spark test in accordance with the following procedure.
      1. Check that the wire harness side connector of the ignition coil assembly is securely connected.

        Result

        Result Proceed to
        NG Connect securely
        OK Go to next step
      2. Perform a spark test on each ignition coil assembly.
        1. If there is a cylinder where sparks do not occur, replace its ignition coil with the ignition coil of a cylinder where sparks occur normally.
        2. Crank the engine and visually check that sparks occur at the cylinder with the normally operating ignition coil.

          Result

          Result Proceed to
          OK Replace ignition coil assembly
          NG Go to next step
      3. Perform a spark test on each spark plug.
        1. If there is a cylinder where sparks do not occur, replace its spark plug with the spark plug of a cylinder where sparks occur normally.
        2. Crank the engine and visually check that sparks occur at the cylinder with the normally operating spark plug.

          Result

          Result Proceed to
          OK Replace spark plug
          NG Inspect the ignition system (Refer to SYSTEM DIAGRAM [06/2016 - ] )
    2. Disconnect the cable from the negative battery terminal.
    3. Remove the air cleaner case sub-assembly with hose.
    4. Remove the 3 bolts and the injector driver.
      GTY692329Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    5. for Automatic Transmission:
      GTY692330Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      1. Remove the 2 bolts and injector cover (for bank 1).
    6. for Manual Transmission:
      GTY730677Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      1. Remove the 2 bolts and disengage the 2 guides, and then remove the injector cover (for bank 1).
    7. Connect the 2 fuel injector connectors.
      GTY732185Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    8. for Automatic Transmission:
      GTY692330Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      1. Install the injector cover (for bank 1) with the 2 bolts.

        Torque: 19 N*m (194 kgf*cm, 14 ft.*lbf) 

    9. for Manual Transmission:
      GTY730677Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      1. Engage the 2 guides and install the injector cover (for bank 1) with the 2 bolts.

        Torque: 19 N*m (194 kgf*cm, 14 ft.*lbf) 

    10. Install the injector driver with the 3 bolts.
      GTY692329Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Torque: 6.4 N*m (65 kgf*cm, 57 in.*lbf) 

      HINT: 

      Do not connect the upper side 2 connectors.

    11. Connect the 4 connectors to the injector driver. Move the lock levers in the direction indicated by the arrow to lock the 3 connectors.
      GTY389701Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      TEXT IN ILLUSTRATION

      *1 Lock Lever
      Connector with Lock Lever
      Connector without Lock Lever
    12. Connect the 2 fuel injector connectors.
      GTY692325Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    13. for Automatic Transmission:
      GTY692324Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      1. Install the injector cover (bank 2) with the 2 bolts.

        Torque: 19 N*m (194 kgf*cm, 14 ft.*lbf) 

    14. for Manual Transmission:
      GTY740643Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      1. Engage the 2 guides and install the injector cover (for bank 1) with the 2 bolts.

        Torque: 19 N*m (194 kgf*cm, 14 ft.*lbf) 

    15. Remove the 2 nuts.
      GTY720952Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    16. Hoist the engine assembly up with an engine sling device and a mini crane.
    17. Install the SST.
      • SST: 09250-53011 
      GTY706672Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    18. Install the ignition coil assembly and spark plug (Refer to INSTALLATION [06/2016 - ] ).
    19. Clear the DTCs (Refer to GENERAL INFORMATION [06/2016 - ] ).
    20. Check for DTCs (Refer to GENERAL INFORMATION [06/2016 - ] ).

      HINT: 

      Reinstall the sensors, connectors, etc. and restore the previous vehicle conditions before rechecking for DTCs.

  3. INSPECT SPARK PLUG 
    NOTE:
    • When replacing a spark plug, make sure to use the designated spark plug because an ion current type misfire detection system is used for the spark plug.
    • Do not damage the platinum tip. If the spark plug has been dropped, make sure to replace it with a designated new spark plug.
    • Do not use a wire brush for cleaning.
    • Do not attempt to adjust the electrode gap of a used spark plug.
    • Make sure to use SST to check gaps, preventing the platinum tip from being damaged.
    • If damaged, replace it with a designated new spark plug.
    1. Check the electrode using a Megohmmeter:
      GTY710289Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      TEXT IN ILLUSTRATION

      *a Ground
      1. Measure the resistance according to the value(s) in the table below.

        Standard Insulation Resistance

        Tester Connection Condition Specified Condition
        Spark plug (terminal part) - Body ground Always 10 MΩ or higher

        HINT: 

        • If the result is not as specified, clean the spark plug with a spark plug cleaner and measure the resistance again.
        • If a Megohmmeter is not available, perform the following simple inspection instead.
    2. Alternative inspection method:
      1. Quickly accelerate the engine to 4000 RPM 5 times.
      2. Remove the spark plug (Refer to REMOVAL [06/2016 - ] ).
      3. Visually check the spark plug.
        GTY387515Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

        If the electrode is dry, the spark plug is functioning properly. If the electrode is damp, proceed to the next step.

        HINT: 

        If a Megohmmeter is not available, perform the following simple inspection instead.

      4. Install the spark plug (Refer to INSTALLATION [06/2016 - ] ).
    3. Check the spark plug for any damage to its threads and insulator.

      HINT: 

      If there is any damage, replace the spark plug.

      Recommended Spark Plug

      Manufacturer Product
      DENSO made ZXE27HBR8
    4. Reference:
      1. Using SST, check the spark plug electrode gap.
        GTY388149Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
        TEXT IN ILLUSTRATION

        *a Spark Plug Electrode Gap
        • SST: 09240-00020 

        Maximum electrode gap for a used spark plug

        1.0 mm (0.0394 in.)

        If the gap exceeds the maximum, replace the spark plug.

        NOTE:

        Never attempt to adjust the gap of a used plug.

        Electrode gap for a new spark plug

        0.7 to 0.8 mm (0.0276 to 0.0315 in.)

    5. Clean the spark plugs.

      If the electrode has traces of wet carbon, clean the electrode with a spark plug cleaner and then dry it.

      Standard air pressure

      588 kPa (6.0 kgf/cm2 , 85 psi)

      Standard duration

      20 seconds or less

      HINT: 

      Only use a spark plug cleaner when the electrode is free of oil. If the electrode has traces of oil, use gasoline to clean off the oil before using the spark plug cleaner.

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